Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aj.....89.1559h&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 89, Oct. 1984, p. 1559-1564.
Astronomy and Astrophysics
Astronomy
17
Celestial Mechanics, Computerized Simulation, Gravitational Effects, Planets, Stellar Motions, Dissociation, Eccentric Orbits, Energy Transfer, Galactic Nuclei, Globular Clusters, Stellar Gravitation
Scientific paper
The paper reports the results of nearly 40,000 computer simulations of close encounters between a planet-star (P-S) system and a stellar intruder. If the closest approach of the intruder is 2 - 3 times the semimajor axis of the orbit or less, the encounter tends to increase the semimajor axis of the P-S system or even dissociate it. More distant encounters tend to produce a mild shrinking of the P-S orbit. Averaged over all impact parameters, the encounters are disruptive. Close encounters which do not lead to disruption usually lead to the stellar intruder capturing the planet. The average orbital eccentricity of a captured planet is greater than e = 0.7, but some close encounters between a solar-mass intruder and an Earth-Sun system would result in the Earth being captured by the stellar intruder in an orbit with an eccentricity of less than e = 0.10.
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